(CNN) -- In the final days before the election, the strategy in battleground Virginia has shifted from getting people registered to making sure they show up to vote.

"The war's being waged in Virginia," said Michael McDonald, associate professor of government and politics at George Mason University and a visiting fellow at the Brookings Institution. "You're seeing both campaigns out in force with their lieutenants and grunts on the ground trying to get people to vote."

With 310,530 new voters registered in Virginia, a whole new group of voters could decide the election in the commonwealth.

However, the Virginia branch of the NAACP sued Gov. Tim Kaine and state election officials on Monday, claiming the state is "inadequately prepared" for the record number of voters expected to turn out in next week's presidential election.

Virginia has voted Republican in every presidential race since 1968, but the latest CNN poll of polls calculated Monday shows Barack Obama with a 7-point advantage over John McCain, 51-44 percent, with 5 percent saying they're undecided. Watch the ground fight in Virginia »

The McCain and Obama campaigns, along with the help of third-party organizations like the AFL-CIO, and women's groups for McCain-Palin have been going door-to-door, making phone calls, handing out literature, and sending text messages to ensure voters know where to go and vote next Tuesday.

McDonald said there is a clear difference in strategy between the two campaigns.

"The Obama campaign is trying to expand the electorate," McDonald said. "While McCain's strategy is to harbor his resources, go after the hard-core voters that are going to vote, that they know they're going to vote, but they really do need to flush them out in that weekend prior to the election."

Democrats in Virginia have outspent the GOP all year in get out the vote efforts.

According to the latest FEC filings, the Virginia Democratic Party has spent $6.2 million this year, while the Republican Party of Virginia has spent $1.5 million.

"We think we've got a great ground game," said Susan Allen, chairwoman of Virginia Women for McCain. "We know we have people-power and a lot of times that amounts to a lot more than what's in somebody's pocketbook."

Allen, who is the wife of former Virginia Sen. George Allen, said the coalitions have been working on behalf of the campaign for months to ensure voters get to the polls. She said their efforts will extend beyond the traditional "72-hour campaign" they have conducted since 2002.

At an AFL-CIO rally on Saturday, Kaine, who was on the shortlist of Obama's vice presidential candidates, worked to get union members energized for the final days of canvassing and member-to-member phone calls.

"You've climbed a mountain," Kaine told a large group of union members who were getting ready to go door-to-door. "We can see the top but we're not at the top. We are still the underdog in this race. We know they're going to pull stunts and tricks in the [final days] to try and get this thing to go their way.